👍 What is a “book” in the age of the web?

In “Opening the Book”, a 2012 presentation I delivered at the late/great Books in Browsers conference, I offered this definition of a book:

A book is a discrete collection of text (and other media) that is designed by an author(s) as an internally complete representation of an idea, or set of ideas; emotion or set of emotions; and transmitted to readers in various formats.